AC/DC
Billy Talent
Evanescence
Good Charlotte
Disturbed
Mika
Paramore (I don't even know why, I don't like them!)
Sugarcult

Bands I've seen live

Adequate Seven
Aiden
Air Traffic
Alas! The Nobles
Alice Cooper
Army Of Freshmen
Audioslave
Biffy Clyro x3
Bloc Party (only a couple of songs)
Bloodhound Gang
Bowling For Soup
Boy Cried Wolf
The Bravery
Brigade
Busted
Daniel Bedingfield (would put him in the ashamed category but he's surprisingly good onstage)
Daniel Powter
Death For A Day
Dopamine x2
The Feeling
Fightstar x2
Foo Fighters
Freefaller
The Futureheads (only a couple of songs)
Get Cape Wear Cape Fly (only a couple of songs again)
Green Day
HIM
Imperial Vipers
InMe
Intervurt
Jack MacManus
Jimmy Eat World x3
Johnny Panic x10
Jyrojets
Kaiser Chiefs
The Killers
Kill Hannah
Linchpin
Madness
The Maple State
Matt Willis
Muse x2
My Chemical Romance x2
Nine Black Alps
The Paddingtons (only a couple of songs)
Queens Of The Stone Age
Rachel Fuller (with Pete fucking Townsend on guitar, fucking yes)
Razorlight
Reel Big Fish
Retrobiff
The Riverclub
Rooster (only a couple of songs)
Samantha Seth
Serpico
Son Of Dork
Sonic Boom Six
Sparkadia
Steps
Stereoglo
The Stranglers
Streetlight Manifesto
Styrofoam
Team Waterpolo
The Wallbirds
ThisGIRL
Undesided
The Undertones
X Is Loaded
You Me At Six
Zebrahead x2

Others I've seen but really aren't bothered about:
5th Avenue
Aberfeldy (well. I heard more than watched)
Atomic Kitten
Buffalo G
Cass Fox
Cathedral
Daphne + Celeste (HAHA remember them?!)
Fair To Midland
Frank Turner
Gareth Gates
Joss Stone (I only heard her, though, didn't watch)
Keane
McFly
Northern Line
The Sea
Second Smile (heard, not watched)
Shy Child
The Sleeping
Tommi
Travis
Will Young
Zoe Birkett

Local bands:
4th Dimension
Audio Narcosis
Bad Dog No Biscuit
Blindspot
Blue Language
Cold Fusion
Dazed
E-merjj
Feedback
The Goat Smugglers
The Gutter Sound
Hetti + The Petticoats
Immunition
Last One Out
The Lemmings
Roll Machine
Saltfishforty
Seamonkey Bringers Of Dooom
Showcase Jay
Superego
Via Tomorrow
Voodoo Lillies
Loads that I can't remember the names of...